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Toyota Sienna Gas Mileage

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  • Hey hansienna,

    I have no idea where you live,but in the north east,and other parts of the country they gasoline providers mix the fuel different from summer to winter.This will drop your mileage some,and also with the denser winter(read cooler) air you will be making more power,and therefore using more fuel.

    Chris
    06 Sienna LE(hers)
    78 Mazda RX-7 GS
    74 Mazda RE/PU
  • jimoasejimoase Posts: 4
    We have 12K+. The car's computer says 22.2. Most of our driving has been triping at 70mph+ or city driving the Mesa area. We are really satisfied with the mileage because most of our driving has been in tough conditions for getting good gas mileage.

    Our only knock about this vehicle is the driver and passenger arm rests not being adjustable. We are in discussion with Toyota hoping the result will be usable arm rests.

    Jim
  • mleonardomleonardo Posts: 45
    I must have a lemon. My 05 AWD limited gets no better than 17.5 according to the van's computer. I have 23,000 miles on it and it sucks gas. I can't understand how other people are getting 23-26 mpg. My van is nowhere near that and I am not holding my breath for better numbers at 23,000 miles.
  • bearcrkrdbearcrkrd Posts: 167
    Hello All. Just got back from a 1,900 mile trip. Did a fair share of two-lane roads, including a huge amount of 15 mph corners on Hiway 1 from the Redwoods to the North end of the Golden Gate, among others. Why I am posting is because I got what I would consider GREAT mileage!! Low of 20, which was less than half a tank, and a high of 30 mpg, which was more than once! Most common mileage figure was 26-28, with the nod going to the 28. I could go on and on and give details, but just want you to know this is a true story, and not about 55-60 mph no-grade freeway driving..:)
    This is the kind of mileage I was hoping for when I purchased the van, as my other new Toyotas (4) since 2001, all 4 cyl, 2 w/auto 2 w/manual, regularly exceeded the window sticker. I was starting to wonder about the Sienna (22-23 has been the norm), especially with gas being so high. Seattle area is even higher than most. I use Premium, too. $3.50 per gallon up this way today...:(
    Have 10,750 on the Odometer now.
  • hansiennahansienna Posts: 2,312
    Congratulations. My 2006 Sienna LE got 29.5 MPG on the last round trip compared to 28.8 MPG on same trip last year. I set the cruise at 66-67 MPH when on the road but obviously must drive 75-80 MPH when on the Los Angeles metropolitan area freeways.
    It now has a 24.2 MPG overall average for 11,600 miles. It got as low as 13.1 MPG in the very cold weather when there was no open road driving. The very best it got was 36.0 MPG at 55 MPH during a round trip test on an almost flat portion of highway.
    I use 85 octane in the Rocky Mountain area (Colorado, Wyoming, Utah), put 91 octane in when I get to lower altitude and then use 87 octane until we get back to the high altitude.
    All of the above mileage is calculator computed. The overhead trip computer reads an average of about 1 % higher than the calculated mileage. :shades:
  • bearcrkrdbearcrkrd Posts: 167
    Forgot to mention, mine is a 2006 CE. I've had the windows tinted, put on the little Toyota plastic splash/mud guards, both on first day I had it, last Nov. The latest, and probably last, is the chrome exhaust tip. Made me feel 10 years younger! :D
  • horn412horn412 Posts: 9
    I'm right there with you on the lousy gas mileage. I have the 2006 LE and in the beginning had pretty good mileage. Then it started getting worse which correlated with an accelerator/brake sensor issue that Toyota repaired. Mileage improved. Now, all of a sudden my mileage is around 13 MPG!!!! (according to computer) It seemed to be revving while braking, so I took it in. They claim no problem and that the computer is not so accurate. (unrelated--computer is also not giving me the idiot light on low fuel until it says I have about 6 miles left) Weather cooled down and I kept track of mileage "the old fashioned way" and it correlated with computer 17 MPG (all city and I have a heavy foot)and I did not have the revving issue. Now it's warmer and mileage is around 14-15 MPG. That's with some highway driving thrown in. The revving issue has returned as well. Thus why I'm on the boards looking for an answer. :) OH, and I live just north of the Mexican border in Texas, so our fuel does not change with the seasons.
  • bearcrkrdbearcrkrd Posts: 167
    I can't help. Wish I could. The 17 all-city mpg, with a lead foot, sounds right. Hope you find some ideas. I owned a 2001 Camry CE w/5sp manual tranny. My sister has it now. Runs like new, at 93,000 miles. I had it for 60, 000 then passed ot on. It is using a quart of oil every 1,250 miles or so. No leaks, doesn't blow smoke, runs great....... I checked the boards and couldn't find anything, so your post about wanting an answer kinda hit home. Good luck, 13mpg is downright unfair! :lemon:
  • wsurfwsurf Posts: 15
    My new Sienna's odometer is inaccurate. I started noticing the problem several days after i bought it as i was measuring coming routes that i have taken for years. This was part of my review for checking the gas mileage. I noticed that i had more mileage on the car when i went to the gas pump than from my previous car. Instead of saying the old car was correct and the Sienna is inaccurate, i went to mapquest and google earth to get some local addresses and see the distance in miles. I tried to pick landmarks/addresses that were relatively distant (more than 30 miles) to increase the accuracy - i would do out-and-back trips in the Sienna to make the measurement. It seems that the odometer on my new Sienna is off by 13 to 14 %. Its showing MORE mileage than i have actually travelled - the worse problem to have with an inaccurate odometer.

    I do not know if this is a warranty issue but is there anything that i can do or expect Toyota to correct on this minivan??
  • dugguduggu Posts: 6
    I got a 2007 Limited couple of months ago. I have about 2000 miles on it now and I am only getting 14-15 MPG. I live in LA area and it's mixed city driving but I feel 15 MPG is too low even for a city like LA with a lot of highways. I even use 91 octane gas most of the time.

    Any suggestions ?
  • I recently bought a 2007 Sienna Limited FWD and now have around 1500 miles. the best mileage I've gotten to date was 18.1 mpg after 3 hours of interstate driving with cruise control set to 62. I get around 17.5 in combined city/hwy driving. Some on her report gettin in low to mid 20s in combo driving and high 20s to low 30s for hwy driving. others report under 20mpg hwy. This is a huge disparity. i complained to the dealer, but got nowhere.
  • bearcrkrdbearcrkrd Posts: 167
    Does seem a bit low. Hang in there. Does So Cal have a different blend of gas, to help lessen air pollution? Or is that just in the winter, like most places?
    I get good mileage, but also work at it. I think lots of people would just consider that not worth the effort.
    Examples; first and biggest, IMO - slow down using light or no gas pedal, rather than the brakes.
    Take a wide arc on corners/turns, again using a light foot and no brake, and even going into the other lane slightly if nobody is around.
    Stuff like that. Hiway trips kinda take care of themselves, but you still need do a little work.
    I'm getting 22-23 around home, 60-40, maybe 50-50 street, hiway. 26-28, mostly just slightly over 28, on freeway trips. And that's driving using the kinda a**l stuff mentioned above. Almost always....
    These are pretty nice vehicles. It's too big for me, as I'm almost always alone, no cargo. Was already thinking of trading in on a '08 Scion XB, but will take a HUGE hit $$ wise on the trade. And, I like this one better every day!
  • avery1avery1 Posts: 372
    Something is strange. Have you measured your mileage the old fashioned way by doing the math yourself? Our 2006 immediately got 26 on the freeway at 70-74mph and 19-20 in the city.
  • horn412horn412 Posts: 9
    I had posted earlier about the same problem and have been to the dealer twice since then. Was given the "computer learns the driver" excuse, but I have 12,000 miles on it. Then I was told that the computer wasn't the most accurate measure of gas mileage--they got that right--it's way too generous! My mileage is actually worse, and highway miles do not help it.

    The herky jerky problems I'm having they say is because I'm not used to the new "drive by wire" (is that right?) accelerator. Update to my previous post--the weather isn't the factor in my herky jerky, it is the AC--anytime I have it on max it is awful! It will even jerk while on the highway with the cruise on--so much that my passenger looked at me and said "what was that?" We are going to try a different dealer when we go on vacation and see what they can come up with. If it keeps up, I'm going to have to go with a Honda, just because I can't stand our Toyota dealer! :(
  • peraltaperalta Posts: 94
    180 miles total on my 2006 Sienna LE 8 passenger (rated 26 MPG highway). I Average 30 mpg with speeds up to 75 MPH. No grandma style driving. I used cruise most of the time including acceleration and deceleration. I incrementally tapped the cruise to increase or decrease speed. One tap up or down equals a speed change of 1 MPH. If you space the tapping far enough, the transmission will stay in 5th gear (it will not down shift).

    I also noticed that I can do highway mileage of 33 MPG on my highlander hybrid (rated at 27 MPG highway).

    I can also do a similar 30-33 MPG on my outback on the highway (rated 28 MPG highway).

    I think the bottom line is how sensitive your are in conserving energy when driving and take advantage of gravity and hills. If I see a downhill anywhere in front of me, I wait until I arrive at the start of the downhill before I accelerate to speed.

    If I am about to encounter an uphill and I drive an automatic gear box, I press the gas but not far enough to cause a downshift. If the top gear is too tall, I don't press further since it will downshift, I will just let the speed decrease to its terminal velocity in top gear.

    If I am driving my Highlander hybrid (CVT), I just set the cruise control to the speed limit on uphill climbs and then go back to just above the speed limit on level roads.

    I used the car's trip computer, scan gauge, and compared them to actual hand calculations. So my trip computer readings and scan gauge readings are corrected based on the hand calculations for each of my cars.

    All my 3 cars have scan gauges. 2 of them have trip computers. None of them are perfectly accurate. The toyota's tend to be conservative in their readings. The Subaru tend to be very optimistic.

    Another thing, aerodynamic drag is a fuel economy killer above 55-60 MPH. Fuel consumption increases exponentially above those speeds.

    I usually begin the trip with speeds above the speed limit just like everybody else. Then I gradually slow down to the speed limit near the end of my trip.
  • ateixeiraateixeira Posts: 72,587
    On a trip this weekend to Six Flags.

    I'm happy because the engine is still very green - just 1300 miles. I hope it improves as it breaks in.
  • jim314jim314 Posts: 491
    All modern passenger cars have a "mass airflow sensor" so the engine still gets the correct amount of air and fuel in winter. The significant increase in fuel use in winter (decline in mpg) is due to a combination of longer warmups from cold start in cold weather, worse traction on wet or icy roads, more traffic congestion due to inclement weather, greater air density in cold weather causing increased aerodynamic resistance at highway speeds.
  • horn412horn412 Posts: 9
    I'm beginning to think they have two different types of Sienna's--those with good mileage and those with horrid mileage. There is absolutely no reason why I shouldn't be getting better mileage--we have no hills, (the exception being overpasses, but I don't do much highway driving) we have no traffic, and while I'm not the softest on the pedal, I'm not a huge lead foot either. In the winter, I don't have to warm my car--I run the AC about 10 months out of the year. I average 40 mph in most of my driving with few traffic lights. Why in the world am I getting 14 mpg!!! :mad: Even on road trips, we have never gotten better than 23, and that is with cruise control and when the van was brand new. It has gotten progressively worse. The oil is changed when it should be, and I'm about to put my third air filter in it. She is not neglected by any means.
  • peraltaperalta Posts: 94
    1. FWD models are more economical than AWD
    2. Add more air to the tires. I have 36 front, 34 rear.
    3. I use toyota synthetic 0-20 oil
    4. Any speed below 35 or above 65 destroys fuel economy.
    5. Keep speed as steady as possible. Frequent speeding up and slowing down kills fuel economy.
    6. Do not accelerate on uphills but keep a steady speed or let the speed slowly drop in order to avoid downshifts.
    7. Use downhills to speed up, that's free energy for acceleration.

    I am able to comsistently get 28-30 MPG from point A to B (highway trips). That is using my scan gauge and the toyota's trip computer. Those readings are cross checked by hand calculations for each refill at the pump.

    However, reality sets in. We cannot avoid traffic congestions, intersections and traffic lights. At the time of refill I only get 22-24 MPG.

    That is where the Toyota Hybrid system comes into picture. My highlander hybrid consistently gets 30's MPG per tank regardless of traffic condition.
  • ateixeiraateixeira Posts: 72,587
    On a short trip for July 4th. All back roads, lights, hills, curves.

    She seems to prefer a flat, straight highway over curvy hills.
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